Grails - criteria query for assoociation

Question

I have domain model like

class Event{

 ...

static belongsTo = [user:User]

} 

and

class User{
  ...
  static hasMany = [events :Event];

}

Now I am simply want to search all events by specified user id. How can I do this? I'm not able to find any example.

Answer 1

This can be done by using the back-reference which is created by "belongsTo".

Simply create a criteria as normal, and use the User Domain object in the criteria to search for the ID or other properties:

Event.createCriteria().list {
     User {
          eqId(1 as Long) //The id of the user you're searching for.
     }
}

Hope that helps!

Answer 2

这是一个简单的用例，您可以通过以下方式找到特定用户的所有事件：获取当前用户，然后

def eventList = user?.events